#include<stdio.h>

#define M 5
#define V

int main()
{
    printf("1 hello world!, M:%d\n", M);
    printf("2 hello world!, M:%d\n", M);
    printf("3 hello world!, M:%d\n", M);
    //printf("hello world!, M:%d\n", M);
    //printf("hello world!, M:%d\n", M);
    //printf("hello world!, M:%d\n", M);
    //printf("hello world!, M:%d\n", M);
    printf("10 hello world!,M:%d\n", M);

#ifdef V
    printf("hello V\n");
#else 
    printf("hello no V\n");
#endif 

    return 0;
}
